Microscope



.Dec. 28, ;1937. G. B. GALLASCH MICROSCOPE Filed June 27, 1955 GEORGE B.GALLASCH Patented "Dec. 28, 1937 PATENT OFFICE MICROSCOPE George B. Grallasch, Rochester, N. Y., assignor.

to Bausch & Lomb Optical ter, N. Y., .a corporation of Company, Roches-New York Application June 27, 1935, Serial No. 28,682

7 Claims.

Thepresent invention relates to microscopes and morev particularly tobinocular microscopes of variable power.

One of the objects of the present invention is to provide a simple,practical and emcient means for varying the power of a binocularmicroscope. Another object is to provide a binocular microscope having amultiple objective carrier movable in an arcuate path. A further objectis to provide a binocular microscope having a multiple objective carriersecured thereto in dust-proof relation. These and other objects andadvantages reside in certain novel features of construction, arrangementand combination of parts as will hereinafter bemore fully set forth andpointed out in the appended claims.

Referring to the drawing:

Fig. 1 is a side elevation bodying my invention.

Fig. 2 is a fragmentary vertical section showing the objective carriermounting.

of a microscope em- One embodiment of my invention is illustrated,

in the drawing wherein Ill indicates a vertical slide upon which ismounted an arm I I carrying the bodymember l2. Mounted upon the bodymember I 2 are prism boxes l3 carrying oculars M. The prism systems maybe of any suitable form such as that shown in Patent 1,225,167 issuedMay 8, 1917 to W. L. Patterson et al.

The lower end of the body member l2 has an arcuate cylindrical form andis closed by a wall l5 which is apertured at l 6 to permit the passageof light to the prism boxes l3. On each side of the body member l2, agroove ll is formed, which extends parallel and closely adjacent to thearcuate wall I 5. The multiple objective carrier l8 has a recess l 9which is slightly wider than the body member l2. A tongue 20 on eachside of the recess [9 cooperates with the adjacent groove I! to slidablysecure the objective carrier l8 to the body member l2.

In the embodiment shown, the objective carrier I8 is provided with rackteeth 2] on each side of the recess I9. A shaft 22 is rotatably mountedin the body member l2 and carries a pinion 23 for engaging each set ofrack teeth 21, and a knurled knob 24 by which the shaft may be turned.The clearance between the wall 15 and the top of the objective carrierI8 is very slight so that dust is substantially excludedfrom the top ofthe objective carrier.

The lower end of the objective carrier I8 is provided with a pluralityof lateral dovetail grooves 25 in which a plurality of objectives 26 arede- 55' tachably secured. These objectives 26 are inter?- changeable andmay take .any convenient form.

One suitable form is that disclosed inthe, application of George B.Gallasch and Henry F. Kurtz, Serial No. 750,171 filed October 26, 1934.

From the foregoing it will be apparent that I am able to attain theobjects of my invention and provide a binocular microscope havingsimple, practical and efficient means for changing the power thereof.Various modifications can, of course, be made without departing from thespirit of my invention or the scope of the appended claims.

I claim:

1. In a microscope, a body member having an arcuately curved lower wall,a groove in each side of said member substantially parallel to saidwall, a multiple objective carrier, a recess in said carrier forreceiving the lower end of said member, a tongue on each side of saidrecess for'engaging the adjacent groove on said member to slidablysecure said carrier to said member, teeth on said carrier, a gearrotatably mounted on said member for. engaging the teeth on saidcarrier, and means for rotating said gear.

2. In a microscope, a body member having an. arcuately curved lowerwall, a groove in each side of said member substantially parallel tosaid wall, a multiple objective carrier, a recess in said carrier forreceiving the lower end of said member, a tongue on each side of saidrecess for engaging the adjacent groove on said member to slidablysecure said carrier to said member, teeth on said carrier, a shaftrotatably journalled in said member, a gear fixed on said shaft forengaging the teeth on said carrier, and a knob for rotating said shaft.

3. In a microscope, a body member having two spaced parallel side walls,a cylindrical arcuately curved bottom wallextending between said sidewalls, a groove on the outer side of each side wall adjacent andparallel to said bottom wall, a multiple objective carrier having twoparallel upstanding projections spaced apart a distance greater than thespacing of said side walls, an inwardly extending tongue on eachprojection so formed as to engage a groove in one of said side walls,and means for sliding said carrier on said member.

4. In a microscope, a body member having two spaced parallel side walls,a cylindrical arcuately curved bottom wall extending between said sidewalls, a groove on the outer side of each side wall adjacent andparallel to said bottom wall, a multiple objective carrier having twoparallel upstanding projections spaced apart a distance greater than thespacing of said side walls, an inwardly extending tongue on eachprojection so formed as to engage a groove in one of said side walls,and means for sliding said carrier on said member, said means comprisingteeth on said carrier, a gear rotatably mounted on said member andengaging said teeth and means for r0- tating said gear.

5. In a microscope, a body member having a cylindrical, arcuately curvedlower wall with a light opening therein, a cylindrical, arcuate track onsaid body member adjacent to and concentric with said wall, an objectivecarrier, means for securing a plurality of objectives on said carrier,means for slidably securing said objective carrier on said. track sothat the objective carrier moves in an arcuate path parallel to saidwall and means for moving said objective carrier along said track toselectively position any 'objective before said opening.

6. In a microscope, a body member having a cylindrical, arcuately curvedlower wall with a light opening therein, a cylindrical, arcuate track onsaid body member adjacent to and concentric with said wall, an objectivecarrier, means for securing a plurality of objectives on said carrier,means for slidably securing said objective carrier on said track so thatthe objective carrier moves in an arcuate path parallel to said wall,means for moving said objective carrier along said track to selectivelyposition any objective before said opening, and means for maintaining adust-proof connection between said carrier and said wall.

7. In a microscope, a body member having an arcuately curved lower wall,a groove on each side of said member substantially parallel to saidwall, a multiple objective carrier, a recess in said carrier forreceiving the lower end of said member, a tongue on each side of saidrecess for engaging the adjacent groove on said member to slidablysecure said carrier to said member, and means for sliding said carrierrelative to said body member.

GEORGE B. GALLASCH.

